Cutter-head for hydraulic dredgers.



No. 709,as:. Patented Sept. 30, I902.

L. w. BATES. I

CUTTER HEAD FOR HYDRAULFG HBEDGEBS.

(Applicat ion filed Jan. 18, 19cm 4 Sheets-Sheet I.

(No Model.)

, Q 1 I v y! A PM! W H w l wwh fillli lllllfl "a 7 WKKQ M No. 709,861. Patented Sept. 30, I902.

L. w; BATES.

CUTTER HEAD FOR HYDRAULIC DREDGERS.

(Application filed. Inn 18. 1900.)

(No Model.) 4 Sheets-Sheet Z :EELE E No. 709,86I. Patented Sept. 30, I902.

v L. w. BATES.

CUTTER HEAD FOR HYDRAULIC DBEDGERS.

(Application filed Jan. 18, 1900.)

m Model.) 4 Sheets-Sheet a.

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Mam; Q Wm 5 #0170 0? No. .709,8.6l. Patented Sept. 30, I902.

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CUTTER HEAD FOR HYDRAULIODBEDGER S.

(Application filed Jan. 18, 1900.)

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(No ModelJ Var/10 1,-

UNITED STATES PATENT OFFICE.

LINDON W. BATES, OF CHICAGO, ILLINOIS.

CUTTER-HEAD FOR HYDRAULIC DREDGERS.

SPECIFICATION forming part of Letters Patent No. 709,861, dated September 30, 1902.

Application filed January 18, 1900. Serial No. 1,906 (No model.)

To all whom it may concern:

Be it known that I, LINDON WV. BATES, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Cutter-Heads for Hydraulic Dredgers, of which the following is a specification.

My present invention relates to improvements in cutters for hydraulic dredgers, the construction and advantages of which will be hereinafter set forth, reference being had to the annexed drawings, wherein Figure 1 is a vertical sectional view of the cutter; Fig. 2, a top plan view, partly in section, the section being taken on the line 1 1; Fig. 3, a bottom plan view; Fig. 4:, a perspective view of one of the cutter-blades; Fig. 5, a similar view of one of the cutter-attaching rings, and Fig. 6 a cross-sectional view of one of the cutter-blades.

One object of the present invention is to secure an easy method of reversing the cutter end for end when one end is worn. Another object is to secure an easy and unobstructed fiow of liquid through the cutter into the suction-pipe. A still further object isto dispense with the usual central lignum vitae bearing, which has been found liable to rapid and excessive wear; and a still further object is to so construct the cutter that the power for driving it will be applied to both ends of the blades instead of at one end only.

In the drawings, A denotes the body of the cutter-head, formed with a central boss B, connected to the body proper by means of webs C. Said body portion is connected to the suction-pipe D'by means of a collar or ring E, which is bolted to the end of the pipe and extends beneath an outwardly-projecting flange formed upon the upper end of the body proper.

The driving-shaft F passes through the central hollow boss, where it is keyed fast, and upon the lower end of said shaft there is mounted a disk G, secured in place by means of the conical formation of the end of' the shaft and a nut which is screwed thereon.

Disk G is formed or provided with an annular seat H at its outer edge adapted and designed to receive a ring I, which is removably secured upon its seat for a purpose which will presently appear. Said ring, as will be more clearly seen in Figs. 3 and 5, is formed with a series of outwardly-extending lugs J, inclining downwardly at the same angle as the upper inclined face of the disk GI A similar ring I is secured to a flange K, extending out from the main body A, said ring being in all respects a duplicate of the lower ring I, with which it is interchangeable. The rings I 1 form the supports forthe main cutting-blades L, which are attached at each end to the lugs J, as shown in Fig. l. Said blades comprise a straight portion M, attachingflanges N, one at each end of the straight section M, a main cutting-body O, which inclines outwardly from the straight portion at a slight angle thereto-say about thirty degrees while at each end of said cutting-body 0 there is formed as a continuation thereof end sections P.

As will be seen upon reference to the drawings, the various parts or sections ofthe cutter pass gradually one into the other in easy curves, so that there are no abrupt projections or angles which would serve to retard the easy action of the cutter in its work or the paster-blades thus constructed are attached by the flanges to the lugs J of the rings I I by -means of countersunk rivets or bolts, as is indicated in the drawings.

When the blades become worn, the rings are detachedand the blades and rings turned end for end, the ring I being attached to the flange on the main body and the ring I to the disk G.

The disk or cutter carrier G is provided with openings Q extending therethrough and beneath which are secured knives R, preferably of the form shown in Fig. 3. These knives are secured to the disk by suitable rivets and serve to sever the material within this portion of the suction-field from its bed and allow it to pass up through the openings Q with the incoming current into the suction-pipe. The lower end of the main body A also has attached to it a ring S, carrying blades T, which extend down toward the upper face of the disk or knife carrier G. Said ring, with the attached knives, is adjustable up and down upon the lower portion of said head or main body A, as will be clearly noted upon reference to Fig. 1. These knives or blades T serve in a measure to disintegrate or break the material as it passes into the cutter-head and also prevent large bodies from enteringthe suction-pipe, which would tend to clog it.

As will be noted upon reference to Fig. 1. the upper face of the disk or cutter carrier G is inclined or the disk as a whole is made in a conical form, the upper portion of the disk or carrier being of the same diameter as the outer diameter of the hollow boss B. From this it will be seen that the matter which is loosened by the cutters has a free and ready access to the interiorof the cutter-head, there being no shoulders or abrupt projections to retard the [low of said material.

To facilitate the easy running of the cutterhead in the ring or band E and to prevent the ingress of sand or grit, which would tend to wear the parts at this point, I provide in said band or disk a groove or channel U, which extends around the same, as is indicated in Figs. 1 and 2. An opening V, Fig. 2, extends out through the band or collar and communicates Willi the groove or channel U, and through this opening water under pressure is forced in, serving to exclude those matters which would cut away or wear the parts. A pipe V extends from this opening to a suitable source of supply.

Having thus described my invention, what I claim is 1. In combination with a suction-pipe, a substantially vertically disposed cutter-head revolubly attached to the lower end thereof; knives carried by said head; and a unitary means for imparting power directly to said head, alike at both ends thereof,substantially as described.

2. In combination with a suction-pipe, a vertically-disposed hollow cutter-head revolubly connected thereto; knives carried by said head; a unitary means for imparting powerdirectly to said head throughout its entire length, whereby power is applied to both ends of the knives alike, substantially as described.

3. In combination with a suction-pipe, a hollow head revolubly attached thereto; a shaft directly connected to the head for imparting motion thereto; a disk carried at the lower end of said shaft beneath the head; and a series of knives attached to the head and disk, substantially as described.

i. In combination with a suction-pipe, a hollow head revolubly attached thereto; a shaft extending through said head and securely fastened thereto; a disk G secured to the lower end of said shaft, said disk being provided with a downwardly-inclined upper face; and a series of knives connected to said head and disk respectively.

5. In combination with a suction-pipe, a hollow cutter-head revolubly connected thereto; a unitary means for applying power throughout the length of said head for imparting rotary motion thereto; and knives connected to then pper and lower ends of said head, substantially as described, whereby the power may be applied to both ends of the knives alike.

(3. In combination with a suction-pipe, a hollow cutter-head revolubly connected there to; a driving-shaft extending through said hollow head and securely fastened thereto; a conical disk G secured to the lower end of said shaft; and a series of knives attached at their ends to the head and disk respectively.

7. In combination with a hollow cutterhead A, a shaft secured to said head and extending therethrough for driving the same; a disk secured to the lower end of said shaft; rings connected to said head and disk respectively; and a series of cutters connected at their ends to said rings, substantially as described.

S. In combination with a hollow cutterhead, a driving-shaft secured to and extending theret-hrough; a disk G secured to the lower end of said shaft, said disk being provided with adownwardly-inclined face; rings attached to said head and disk respectively; and a series of cutters connected to said rings, substantially as described.

9. In combination with a hollow cutterhead, provided with an outwardly-extending rim or flange; a driving-shaft extending therethrough and secured to said head; a conical disk G secured to the lower end of said shaft; rings 1, I attached to said cutter-head and disk respectively, said rings being provided with outwardly-extending lugs; and a series of cutters attached to said lugs, substantally as described.

10. In combination with a hollow cutterhead, a shaft secured to said head and extending therethrough for operating the same; a conical disk attached to and carried by the lower end of said shaft; a pair of reversible rings carried by said head and disk; and a series of cutters attached to said rings, substantially as described.

11. In combination with a hollow cutterhead,ashaft extending therethrough for driving the same; a disk G secured to the lower end of said shaft and provided with a downwardly-inclined upper face; rings attached to said head and disk respectively; a series of cutters attached to said rings; and a second series of cutters attached to the lower end of the head and extending down toward the upper face of the disk, substantially as and for the purpose described.

12. In combination with a hollow cutterhead, a shaft extending through the same for imparting rotary motion thereto; a conicalshaped disk G attached to the lower end of said shaft; rings attached to said head and disk respectively; cutters carried by said rings; a second series of cutters carried by the lower end of said cutter-head and extending down toward the upper face of said disk G; and a third series of cutters secured upon the under face of the disk in line with a series of openings formed therein, substantially as described.

13. In combination with a suction-pipe, a hollow cutter-head, a ring or band E secured to the lower end of said suction-pipe around the upper portion of the cutter-head; a groove or channel intermediate said band or collar and cutter-head and means for forcing water under pressure into said groove or channel.

14. In combination with a hollow cutterhead respectively; and a series of cutterblades attached to said rings, said blades comprising a straight body-section M, flanges N adapted to bear upon the rings, and inclined cutting-sections O, P, substantially as described In testimony whereof I have signed my name to this specification in the presence of 30 two subscribing witnesses.

LINDON W. BATES.

Witnesses:

PERCY E. MATTOCKS, H. DIAYKELS. 

